Further work on refactor to interface based scripts

Plugins/PkmnLib.Plugin.Gen7/Scripts/Weather/Rain.cs

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Weather;
 
 [Script(ScriptCategory.Weather, "rain")]
-public class Rain : Script, ILimitedTurnsScript
+public class Rain : Script, ILimitedTurnsScript, IScriptChangeBasePower
 {
     private int? _duration;
 
@@ -25,7 +25,7 @@ public class Rain : Script, ILimitedTurnsScript
     }
 
     /// <inheritdoc />
-    public override void ChangeBasePower(IExecutingMove move, IPokemon target, byte hit, ref ushort basePower)
+    public void ChangeBasePower(IExecutingMove move, IPokemon target, byte hit, ref ushort basePower)
     {
         var hitType = move.GetHitData(target, hit).Type;
         if (hitType?.Name == "water")